How to Refine Gold (with Pictures) wikiHow
Nov 16, 2019· Once you melt the gold down, you''ll need to soak it in nitric acid and hydrochloric acid as well as urea and precipitant to help break it down further. Before you can reheat the gold, you''ll need to clean it. Then, you can pour it into a mold and reconstitute it. To learn how to test the acid for dissolved gold.